Same Product, Different Model No.?

Hi all, does anyone know if there is any difference between the FPCBP136D and the FPCBP136AP ?

I'm looking to buy a modular bay battery for my Lifebook S6311 which was purchased in Asia. So when I look for the accessories through the US store, my model is obviously not up there. But through the Singapore site, I found the battery, and it has the same model number except that it ends in D vs. AP. So is it just a matter of different international model numbers for the same product or are they really different? I'm hoping to just buy through the Fujitsu direct store...

And the compatibility all overlaps EXCEPT for my laptop (of course) and some other random one.

FPCBP136D (Singapore):
T4215, S6311, E8210, S7110, C1410, E8110, S2210, E8410, S7111, T4220

FPCBP136AP (US):
C1320D, C1320D, C1410, E8010, E8010D, E8020, E8020D, E8110, E8110, E8210, E8210, E8310, E8410, S2110, S2210, S2210, S6210, S6220, S6231, S6240, S7010, S7010D, S7020, S7020D, S7110, S7110, S7210, S7211, S7211, T4010, T4010, T4010D, T4010D, T4020, T4020D, T4210, T4215, T4220

This also applies to all the other accessories that seem to be the same but end a different letter or so.

Thannks

 

They look (as in the pictures) like different parts that are just compatible with multiple of the same systems. Not too odd.